| /* |
| * TAP-Win32 -- A kernel driver to provide virtual tap device functionality |
| * on Windows. Originally derived from the CIPE-Win32 |
| * project by Damion K. Wilson, with extensive modifications by |
| * James Yonan. |
| * |
| * All source code which derives from the CIPE-Win32 project is |
| * Copyright (C) Damion K. Wilson, 2003, and is released under the |
| * GPL version 2 (see below). |
| * |
| * All other source code is Copyright (C) James Yonan, 2003-2004, |
| * and is released under the GPL version 2 (see below). |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program (see the file COPYING included with this |
| * distribution); if not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "tap_int.h" |
| |
| #include "clients.h" /* net_init_tap */ |
| #include "net/eth.h" |
| #include "net/net.h" |
| #include "net/tap.h" /* tap_has_ufo, ... */ |
| #include "qemu/error-report.h" |
| #include "qemu/main-loop.h" |
| #include <windows.h> |
| #include <winioctl.h> |
| |
| //============= |
| // TAP IOCTLs |
| //============= |
| |
| #define TAP_CONTROL_CODE(request,method) \ |
| CTL_CODE (FILE_DEVICE_UNKNOWN, request, method, FILE_ANY_ACCESS) |
| |
| #define TAP_IOCTL_GET_MAC TAP_CONTROL_CODE (1, METHOD_BUFFERED) |
| #define TAP_IOCTL_GET_VERSION TAP_CONTROL_CODE (2, METHOD_BUFFERED) |
| #define TAP_IOCTL_GET_MTU TAP_CONTROL_CODE (3, METHOD_BUFFERED) |
| #define TAP_IOCTL_GET_INFO TAP_CONTROL_CODE (4, METHOD_BUFFERED) |
| #define TAP_IOCTL_CONFIG_POINT_TO_POINT TAP_CONTROL_CODE (5, METHOD_BUFFERED) |
| #define TAP_IOCTL_SET_MEDIA_STATUS TAP_CONTROL_CODE (6, METHOD_BUFFERED) |
| #define TAP_IOCTL_CONFIG_DHCP_MASQ TAP_CONTROL_CODE (7, METHOD_BUFFERED) |
| #define TAP_IOCTL_GET_LOG_LINE TAP_CONTROL_CODE (8, METHOD_BUFFERED) |
| #define TAP_IOCTL_CONFIG_DHCP_SET_OPT TAP_CONTROL_CODE (9, METHOD_BUFFERED) |
| |
| //================= |
| // Registry keys |
| //================= |
| |
| #define ADAPTER_KEY "SYSTEM\\CurrentControlSet\\Control\\Class\\{4D36E972-E325-11CE-BFC1-08002BE10318}" |
| |
| #define NETWORK_CONNECTIONS_KEY "SYSTEM\\CurrentControlSet\\Control\\Network\\{4D36E972-E325-11CE-BFC1-08002BE10318}" |
| |
| //====================== |
| // Filesystem prefixes |
| //====================== |
| |
| #define USERMODEDEVICEDIR "\\\\.\\Global\\" |
| #define TAPSUFFIX ".tap" |
| |
| |
| //====================== |
| // Compile time configuration |
| //====================== |
| |
| //#define DEBUG_TAP_WIN32 |
| |
| /* FIXME: The asynch write path appears to be broken at |
| * present. WriteFile() ignores the lpNumberOfBytesWritten parameter |
| * for overlapped writes, with the result we return zero bytes sent, |
| * and after handling a single packet, receive is disabled for this |
| * interface. */ |
| /* #define TUN_ASYNCHRONOUS_WRITES 1 */ |
| |
| #define TUN_BUFFER_SIZE 1560 |
| #define TUN_MAX_BUFFER_COUNT 32 |
| |
| /* |
| * The data member "buffer" must be the first element in the tun_buffer |
| * structure. See the function, tap_win32_free_buffer. |
| */ |
| typedef struct tun_buffer_s { |
| unsigned char buffer [TUN_BUFFER_SIZE]; |
| unsigned long read_size; |
| struct tun_buffer_s* next; |
| } tun_buffer_t; |
| |
| typedef struct tap_win32_overlapped { |
| HANDLE handle; |
| HANDLE read_event; |
| HANDLE write_event; |
| HANDLE output_queue_semaphore; |
| HANDLE free_list_semaphore; |
| HANDLE tap_semaphore; |
| CRITICAL_SECTION output_queue_cs; |
| CRITICAL_SECTION free_list_cs; |
| OVERLAPPED read_overlapped; |
| OVERLAPPED write_overlapped; |
| tun_buffer_t buffers[TUN_MAX_BUFFER_COUNT]; |
| tun_buffer_t* free_list; |
| tun_buffer_t* output_queue_front; |
| tun_buffer_t* output_queue_back; |
| } tap_win32_overlapped_t; |
| |
| static tap_win32_overlapped_t tap_overlapped; |
| |
| static tun_buffer_t* get_buffer_from_free_list(tap_win32_overlapped_t* const overlapped) |
| { |
| tun_buffer_t* buffer = NULL; |
| WaitForSingleObject(overlapped->free_list_semaphore, INFINITE); |
| EnterCriticalSection(&overlapped->free_list_cs); |
| buffer = overlapped->free_list; |
| // assert(buffer != NULL); |
| overlapped->free_list = buffer->next; |
| LeaveCriticalSection(&overlapped->free_list_cs); |
| buffer->next = NULL; |
| return buffer; |
| } |
| |
| static void put_buffer_on_free_list(tap_win32_overlapped_t* const overlapped, tun_buffer_t* const buffer) |
| { |
| EnterCriticalSection(&overlapped->free_list_cs); |
| buffer->next = overlapped->free_list; |
| overlapped->free_list = buffer; |
| LeaveCriticalSection(&overlapped->free_list_cs); |
| ReleaseSemaphore(overlapped->free_list_semaphore, 1, NULL); |
| } |
| |
| static tun_buffer_t* get_buffer_from_output_queue(tap_win32_overlapped_t* const overlapped, const int block) |
| { |
| tun_buffer_t* buffer = NULL; |
| DWORD result, timeout = block ? INFINITE : 0L; |
| |
| // Non-blocking call |
| result = WaitForSingleObject(overlapped->output_queue_semaphore, timeout); |
| |
| switch (result) |
| { |
| // The semaphore object was signaled. |
| case WAIT_OBJECT_0: |
| EnterCriticalSection(&overlapped->output_queue_cs); |
| |
| buffer = overlapped->output_queue_front; |
| overlapped->output_queue_front = buffer->next; |
| |
| if(overlapped->output_queue_front == NULL) { |
| overlapped->output_queue_back = NULL; |
| } |
| |
| LeaveCriticalSection(&overlapped->output_queue_cs); |
| break; |
| |
| // Semaphore was nonsignaled, so a time-out occurred. |
| case WAIT_TIMEOUT: |
| // Cannot open another window. |
| break; |
| } |
| |
| return buffer; |
| } |
| |
| static tun_buffer_t* get_buffer_from_output_queue_immediate (tap_win32_overlapped_t* const overlapped) |
| { |
| return get_buffer_from_output_queue(overlapped, 0); |
| } |
| |
| static void put_buffer_on_output_queue(tap_win32_overlapped_t* const overlapped, tun_buffer_t* const buffer) |
| { |
| EnterCriticalSection(&overlapped->output_queue_cs); |
| |
| if(overlapped->output_queue_front == NULL && overlapped->output_queue_back == NULL) { |
| overlapped->output_queue_front = overlapped->output_queue_back = buffer; |
| } else { |
| buffer->next = NULL; |
| overlapped->output_queue_back->next = buffer; |
| overlapped->output_queue_back = buffer; |
| } |
| |
| LeaveCriticalSection(&overlapped->output_queue_cs); |
| |
| ReleaseSemaphore(overlapped->output_queue_semaphore, 1, NULL); |
| } |
| |
| |
| static int is_tap_win32_dev(const char *guid) |
| { |
| HKEY netcard_key; |
| LONG status; |
| DWORD len; |
| int i = 0; |
| |
| status = RegOpenKeyEx( |
| HKEY_LOCAL_MACHINE, |
| ADAPTER_KEY, |
| 0, |
| KEY_READ, |
| &netcard_key); |
| |
| if (status != ERROR_SUCCESS) { |
| return FALSE; |
| } |
| |
| for (;;) { |
| char enum_name[256]; |
| g_autofree char *unit_string = NULL; |
| HKEY unit_key; |
| char component_id_string[] = "ComponentId"; |
| char component_id[256]; |
| char net_cfg_instance_id_string[] = "NetCfgInstanceId"; |
| char net_cfg_instance_id[256]; |
| DWORD data_type; |
| |
| len = sizeof (enum_name); |
| status = RegEnumKeyEx( |
| netcard_key, |
| i, |
| enum_name, |
| &len, |
| NULL, |
| NULL, |
| NULL, |
| NULL); |
| |
| if (status == ERROR_NO_MORE_ITEMS) |
| break; |
| else if (status != ERROR_SUCCESS) { |
| return FALSE; |
| } |
| |
| unit_string = g_strdup_printf("%s\\%s", ADAPTER_KEY, enum_name); |
| |
| status = RegOpenKeyEx( |
| HKEY_LOCAL_MACHINE, |
| unit_string, |
| 0, |
| KEY_READ, |
| &unit_key); |
| |
| if (status != ERROR_SUCCESS) { |
| return FALSE; |
| } else { |
| len = sizeof (component_id); |
| status = RegQueryValueEx( |
| unit_key, |
| component_id_string, |
| NULL, |
| &data_type, |
| (LPBYTE)component_id, |
| &len); |
| |
| if (!(status != ERROR_SUCCESS || data_type != REG_SZ)) { |
| len = sizeof (net_cfg_instance_id); |
| status = RegQueryValueEx( |
| unit_key, |
| net_cfg_instance_id_string, |
| NULL, |
| &data_type, |
| (LPBYTE)net_cfg_instance_id, |
| &len); |
| |
| if (status == ERROR_SUCCESS && data_type == REG_SZ) { |
| if (/* !strcmp (component_id, TAP_COMPONENT_ID) &&*/ |
| !strcmp (net_cfg_instance_id, guid)) { |
| RegCloseKey (unit_key); |
| RegCloseKey (netcard_key); |
| return TRUE; |
| } |
| } |
| } |
| RegCloseKey (unit_key); |
| } |
| ++i; |
| } |
| |
| RegCloseKey (netcard_key); |
| return FALSE; |
| } |
| |
| static int get_device_guid( |
| char *name, |
| int name_size, |
| char *actual_name, |
| int actual_name_size) |
| { |
| LONG status; |
| HKEY control_net_key; |
| DWORD len; |
| int i = 0; |
| int stop = 0; |
| |
| status = RegOpenKeyEx( |
| HKEY_LOCAL_MACHINE, |
| NETWORK_CONNECTIONS_KEY, |
| 0, |
| KEY_READ, |
| &control_net_key); |
| |
| if (status != ERROR_SUCCESS) { |
| return -1; |
| } |
| |
| while (!stop) |
| { |
| char enum_name[256]; |
| g_autofree char *connection_string = NULL; |
| HKEY connection_key; |
| char name_data[256]; |
| DWORD name_type; |
| const char name_string[] = "Name"; |
| |
| len = sizeof (enum_name); |
| status = RegEnumKeyEx( |
| control_net_key, |
| i, |
| enum_name, |
| &len, |
| NULL, |
| NULL, |
| NULL, |
| NULL); |
| |
| if (status == ERROR_NO_MORE_ITEMS) |
| break; |
| else if (status != ERROR_SUCCESS) { |
| return -1; |
| } |
| |
| connection_string = g_strdup_printf("%s\\%s\\Connection", |
| NETWORK_CONNECTIONS_KEY, enum_name); |
| |
| status = RegOpenKeyEx( |
| HKEY_LOCAL_MACHINE, |
| connection_string, |
| 0, |
| KEY_READ, |
| &connection_key); |
| |
| if (status == ERROR_SUCCESS) { |
| len = sizeof (name_data); |
| status = RegQueryValueEx( |
| connection_key, |
| name_string, |
| NULL, |
| &name_type, |
| (LPBYTE)name_data, |
| &len); |
| |
| if (status != ERROR_SUCCESS || name_type != REG_SZ) { |
| ++i; |
| continue; |
| } |
| else { |
| if (is_tap_win32_dev(enum_name)) { |
| snprintf(name, name_size, "%s", enum_name); |
| if (actual_name) { |
| if (strcmp(actual_name, "") != 0) { |
| if (strcmp(name_data, actual_name) != 0) { |
| RegCloseKey (connection_key); |
| ++i; |
| continue; |
| } |
| } |
| else { |
| snprintf(actual_name, actual_name_size, "%s", name_data); |
| } |
| } |
| stop = 1; |
| } |
| } |
| |
| RegCloseKey (connection_key); |
| } |
| ++i; |
| } |
| |
| RegCloseKey (control_net_key); |
| |
| if (stop == 0) |
| return -1; |
| |
| return 0; |
| } |
| |
| static int tap_win32_set_status(HANDLE handle, int status) |
| { |
| unsigned long len = 0; |
| |
| return DeviceIoControl(handle, TAP_IOCTL_SET_MEDIA_STATUS, |
| &status, sizeof (status), |
| &status, sizeof (status), &len, NULL); |
| } |
| |
| static void tap_win32_overlapped_init(tap_win32_overlapped_t* const overlapped, const HANDLE handle) |
| { |
| overlapped->handle = handle; |
| |
| overlapped->read_event = CreateEvent(NULL, FALSE, FALSE, NULL); |
| overlapped->write_event = CreateEvent(NULL, FALSE, FALSE, NULL); |
| |
| overlapped->read_overlapped.Offset = 0; |
| overlapped->read_overlapped.OffsetHigh = 0; |
| overlapped->read_overlapped.hEvent = overlapped->read_event; |
| |
| overlapped->write_overlapped.Offset = 0; |
| overlapped->write_overlapped.OffsetHigh = 0; |
| overlapped->write_overlapped.hEvent = overlapped->write_event; |
| |
| InitializeCriticalSection(&overlapped->output_queue_cs); |
| InitializeCriticalSection(&overlapped->free_list_cs); |
| |
| overlapped->output_queue_semaphore = CreateSemaphore( |
| NULL, // default security attributes |
| 0, // initial count |
| TUN_MAX_BUFFER_COUNT, // maximum count |
| NULL); // unnamed semaphore |
| |
| if(!overlapped->output_queue_semaphore) { |
| fprintf(stderr, "error creating output queue semaphore!\n"); |
| } |
| |
| overlapped->free_list_semaphore = CreateSemaphore( |
| NULL, // default security attributes |
| TUN_MAX_BUFFER_COUNT, // initial count |
| TUN_MAX_BUFFER_COUNT, // maximum count |
| NULL); // unnamed semaphore |
| |
| if(!overlapped->free_list_semaphore) { |
| fprintf(stderr, "error creating free list semaphore!\n"); |
| } |
| |
| overlapped->free_list = overlapped->output_queue_front = overlapped->output_queue_back = NULL; |
| |
| { |
| unsigned index; |
| for(index = 0; index < TUN_MAX_BUFFER_COUNT; index++) { |
| tun_buffer_t* element = &overlapped->buffers[index]; |
| element->next = overlapped->free_list; |
| overlapped->free_list = element; |
| } |
| } |
| /* To count buffers, initially no-signal. */ |
| overlapped->tap_semaphore = CreateSemaphore(NULL, 0, TUN_MAX_BUFFER_COUNT, NULL); |
| if(!overlapped->tap_semaphore) |
| fprintf(stderr, "error creating tap_semaphore.\n"); |
| } |
| |
| static int tap_win32_write(tap_win32_overlapped_t *overlapped, |
| const void *buffer, unsigned long size) |
| { |
| unsigned long write_size; |
| BOOL result; |
| DWORD error; |
| |
| #ifdef TUN_ASYNCHRONOUS_WRITES |
| result = GetOverlappedResult( overlapped->handle, &overlapped->write_overlapped, |
| &write_size, FALSE); |
| |
| if (!result && GetLastError() == ERROR_IO_INCOMPLETE) |
| WaitForSingleObject(overlapped->write_event, INFINITE); |
| #endif |
| |
| result = WriteFile(overlapped->handle, buffer, size, |
| &write_size, &overlapped->write_overlapped); |
| |
| #ifdef TUN_ASYNCHRONOUS_WRITES |
| /* FIXME: we can't sensibly set write_size here, without waiting |
| * for the IO to complete! Moreover, we can't return zero, |
| * because that will disable receive on this interface, and we |
| * also can't assume it will succeed and return the full size, |
| * because that will result in the buffer being reclaimed while |
| * the IO is in progress. */ |
| #error Async writes are broken. Please disable TUN_ASYNCHRONOUS_WRITES. |
| #else /* !TUN_ASYNCHRONOUS_WRITES */ |
| if (!result) { |
| error = GetLastError(); |
| if (error == ERROR_IO_PENDING) { |
| result = GetOverlappedResult(overlapped->handle, |
| &overlapped->write_overlapped, |
| &write_size, TRUE); |
| } |
| } |
| #endif |
| |
| if (!result) { |
| #ifdef DEBUG_TAP_WIN32 |
| LPTSTR msgbuf; |
| error = GetLastError(); |
| FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM, |
| NULL, error, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), |
| &msgbuf, 0, NULL); |
| fprintf(stderr, "Tap-Win32: Error WriteFile %d - %s\n", error, msgbuf); |
| LocalFree(msgbuf); |
| #endif |
| return 0; |
| } |
| |
| return write_size; |
| } |
| |
| static DWORD WINAPI tap_win32_thread_entry(LPVOID param) |
| { |
| tap_win32_overlapped_t *overlapped = (tap_win32_overlapped_t*)param; |
| unsigned long read_size; |
| BOOL result; |
| DWORD dwError; |
| tun_buffer_t* buffer = get_buffer_from_free_list(overlapped); |
| |
| |
| for (;;) { |
| result = ReadFile(overlapped->handle, |
| buffer->buffer, |
| sizeof(buffer->buffer), |
| &read_size, |
| &overlapped->read_overlapped); |
| if (!result) { |
| dwError = GetLastError(); |
| if (dwError == ERROR_IO_PENDING) { |
| WaitForSingleObject(overlapped->read_event, INFINITE); |
| result = GetOverlappedResult( overlapped->handle, &overlapped->read_overlapped, |
| &read_size, FALSE); |
| if (!result) { |
| #ifdef DEBUG_TAP_WIN32 |
| LPVOID lpBuffer; |
| dwError = GetLastError(); |
| FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM, |
| NULL, dwError, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), |
| (LPTSTR) & lpBuffer, 0, NULL ); |
| fprintf(stderr, "Tap-Win32: Error GetOverlappedResult %d - %s\n", dwError, lpBuffer); |
| LocalFree( lpBuffer ); |
| #endif |
| } |
| } else { |
| #ifdef DEBUG_TAP_WIN32 |
| LPVOID lpBuffer; |
| FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM, |
| NULL, dwError, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), |
| (LPTSTR) & lpBuffer, 0, NULL ); |
| fprintf(stderr, "Tap-Win32: Error ReadFile %d - %s\n", dwError, lpBuffer); |
| LocalFree( lpBuffer ); |
| #endif |
| } |
| } |
| |
| if(read_size > 0) { |
| buffer->read_size = read_size; |
| put_buffer_on_output_queue(overlapped, buffer); |
| ReleaseSemaphore(overlapped->tap_semaphore, 1, NULL); |
| buffer = get_buffer_from_free_list(overlapped); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int tap_win32_read(tap_win32_overlapped_t *overlapped, |
| uint8_t **pbuf, int max_size) |
| { |
| int size = 0; |
| |
| tun_buffer_t* buffer = get_buffer_from_output_queue_immediate(overlapped); |
| |
| if(buffer != NULL) { |
| *pbuf = buffer->buffer; |
| size = (int)buffer->read_size; |
| if(size > max_size) { |
| size = max_size; |
| } |
| } |
| |
| return size; |
| } |
| |
| static void tap_win32_free_buffer(tap_win32_overlapped_t *overlapped, |
| uint8_t *pbuf) |
| { |
| tun_buffer_t* buffer = (tun_buffer_t*)pbuf; |
| put_buffer_on_free_list(overlapped, buffer); |
| } |
| |
| static int tap_win32_open(tap_win32_overlapped_t **phandle, |
| const char *preferred_name) |
| { |
| g_autofree char *device_path = NULL; |
| char device_guid[0x100]; |
| int rc; |
| HANDLE handle; |
| BOOL bret; |
| char name_buffer[0x100] = {0, }; |
| struct { |
| unsigned long major; |
| unsigned long minor; |
| unsigned long debug; |
| } version; |
| DWORD version_len; |
| DWORD idThread; |
| |
| if (preferred_name != NULL) { |
| snprintf(name_buffer, sizeof(name_buffer), "%s", preferred_name); |
| } |
| |
| rc = get_device_guid(device_guid, sizeof(device_guid), name_buffer, sizeof(name_buffer)); |
| if (rc) |
| return -1; |
| |
| device_path = g_strdup_printf("%s%s%s", |
| USERMODEDEVICEDIR, |
| device_guid, |
| TAPSUFFIX); |
| |
| handle = CreateFile ( |
| device_path, |
| GENERIC_READ | GENERIC_WRITE, |
| 0, |
| 0, |
| OPEN_EXISTING, |
| FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED, |
| 0 ); |
| |
| if (handle == INVALID_HANDLE_VALUE) { |
| return -1; |
| } |
| |
| bret = DeviceIoControl(handle, TAP_IOCTL_GET_VERSION, |
| &version, sizeof (version), |
| &version, sizeof (version), &version_len, NULL); |
| |
| if (bret == FALSE) { |
| CloseHandle(handle); |
| return -1; |
| } |
| |
| if (!tap_win32_set_status(handle, TRUE)) { |
| return -1; |
| } |
| |
| tap_win32_overlapped_init(&tap_overlapped, handle); |
| |
| *phandle = &tap_overlapped; |
| |
| CreateThread(NULL, 0, tap_win32_thread_entry, |
| (LPVOID)&tap_overlapped, 0, &idThread); |
| return 0; |
| } |
| |
| /********************************************/ |
| |
| typedef struct TAPState { |
| NetClientState nc; |
| tap_win32_overlapped_t *handle; |
| } TAPState; |
| |
| static void tap_cleanup(NetClientState *nc) |
| { |
| TAPState *s = DO_UPCAST(TAPState, nc, nc); |
| |
| qemu_del_wait_object(s->handle->tap_semaphore, NULL, NULL); |
| |
| /* FIXME: need to kill thread and close file handle: |
| tap_win32_close(s); |
| */ |
| } |
| |
| static ssize_t tap_receive(NetClientState *nc, const uint8_t *buf, size_t size) |
| { |
| TAPState *s = DO_UPCAST(TAPState, nc, nc); |
| |
| return tap_win32_write(s->handle, buf, size); |
| } |
| |
| static void tap_win32_send(void *opaque) |
| { |
| TAPState *s = opaque; |
| uint8_t *buf, *orig_buf; |
| int max_size = 4096; |
| int size; |
| uint8_t min_pkt[ETH_ZLEN]; |
| size_t min_pktsz = sizeof(min_pkt); |
| |
| size = tap_win32_read(s->handle, &buf, max_size); |
| if (size > 0) { |
| orig_buf = buf; |
| |
| if (net_peer_needs_padding(&s->nc)) { |
| if (eth_pad_short_frame(min_pkt, &min_pktsz, buf, size)) { |
| buf = min_pkt; |
| size = min_pktsz; |
| } |
| } |
| |
| qemu_send_packet(&s->nc, buf, size); |
| tap_win32_free_buffer(s->handle, orig_buf); |
| } |
| } |
| |
| struct vhost_net *tap_get_vhost_net(NetClientState *nc) |
| { |
| return NULL; |
| } |
| |
| static NetClientInfo net_tap_win32_info = { |
| .type = NET_CLIENT_DRIVER_TAP, |
| .size = sizeof(TAPState), |
| .receive = tap_receive, |
| .cleanup = tap_cleanup, |
| }; |
| |
| static int tap_win32_init(NetClientState *peer, const char *model, |
| const char *name, const char *ifname) |
| { |
| NetClientState *nc; |
| TAPState *s; |
| tap_win32_overlapped_t *handle; |
| |
| if (tap_win32_open(&handle, ifname) < 0) { |
| printf("tap: Could not open '%s'\n", ifname); |
| return -1; |
| } |
| |
| nc = qemu_new_net_client(&net_tap_win32_info, peer, model, name); |
| |
| s = DO_UPCAST(TAPState, nc, nc); |
| |
| qemu_set_info_str(&s->nc, "tap: ifname=%s", ifname); |
| |
| s->handle = handle; |
| |
| qemu_add_wait_object(s->handle->tap_semaphore, tap_win32_send, s); |
| |
| return 0; |
| } |
| |
| int net_init_tap(const Netdev *netdev, const char *name, |
| NetClientState *peer, Error **errp) |
| { |
| /* FIXME error_setg(errp, ...) on failure */ |
| const NetdevTapOptions *tap; |
| |
| assert(netdev->type == NET_CLIENT_DRIVER_TAP); |
| tap = &netdev->u.tap; |
| |
| if (!tap->ifname) { |
| error_report("tap: no interface name"); |
| return -1; |
| } |
| |
| if (tap_win32_init(peer, "tap", name, tap->ifname) == -1) { |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| int tap_enable(NetClientState *nc) |
| { |
| abort(); |
| } |
| |
| int tap_disable(NetClientState *nc) |
| { |
| abort(); |
| } |
